Twisting machine



March 18 1924.

H. DOHI ERTY, JR

-TWISTING MACHINE Filed July 18, 1923 M, W T e INVENTOR,

A 770mm Patented iv" 18, 1924,

STATQS PATENT OFFICE.

HENRY nonEnrY, an, or cmr'roN, NEw JERSEY, ASSIGNOR .ro HENRY DOHERTY srnn conrnnr, or CLIFTON, NEW JERSEY, A CORPORATION or NEW JERSEY.

TWISTING MACHINE.

Application filed July 18, 1923. Serial No. 652,240.

To all whom it may concern:

Be it known that I. HENRY Dorrnnrr, Jr, a citizen of the United States, residing at Clifton, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Twisting Machines, of which the following is a specification.

In yarn twisting machines of the class in which the yarn strands to be brought together and twisted around each other are led downwardly from their supply means through suitable guiding means, then are passed several times around a rotated yarnfeeding roller Or rollers and then down to spinning means, it has been proposed to provide adjacent the feeding roller or rollers a guide member around which the several turns of the yarn also extend and which presents a yarn-guiding surface that is convergent with respect to the axis of such roller or each roller, so that in operation the various turns of the yarn will be kept distinct from each other. This guide member is in the form of a short rod, usually round in cross-section and made of porcelain, and it is set so as to be spaced from the roller or rollers sufficiently so that each bight or bend of yarn formed around it will stand out clear. In practice, this guide member as thus constructed gives rise to these irregularities, to wit: Sometimes the yarn will get a turn around the guide member, alone; that is, instead of one of the turns being made to embrace both the roller (or rollers) and the guide member. it will be made only to encompass the guide member. This, since it increases the resistance to the advance of and hence reduces the speed of the yarn in its travel toward the spinning means, results in the yarn becoming hard twisted, or at any rate acquiring more twists per unit of lineal measure than it is intended to have. Again, if a strand breaks and the yarn starts to wind on one of the feeding rollers, a ringer or wound accumulation of yarn will form on the feeding roller, ultimatelly growing to such a thickness as to crowd the guiding member away and finally cause it to break off under the strain. I

in the present invention I provide near the guide-member and the feeding means (shown as asingle feedingroller herein, by

way of example) a yarn-disrupting ridge, preferably substantially an edge, facing away from the guiding surface of the guiding member and arranged in the best form of the invention within what I herein term the shed maintained by the feeding means and guiding member. In the example herein shown, this is provided on a part distinct from the guiding member itself (specifically, on its support), and there are two such ridges, facing oppositely to each other. The practical effect of such a ridge or ridges when in use will be later set forth.

In the drawing, I

Fig. 1 shows a twisting unit embodying my invention;

Fig. 2 is a sectional view on line 22, Fig. 1;

Fig. 3 is' a plan of the guiding member and its support;

Fig. 4 is a. side elevation thereof. partly in section; and

Fig. 5 is an end elevation thereof.

a: designates the bobbins from which the yarn strands A are taken, I) guiding means for the two strands, 0 the yarn-feeding roller journalled in a bracket (Z secured to a rail e of the machine, said roller being adapted to be rotated in any suitable way (not shown) and f the receiving bobbin suitably rotated and having associated therewith aring (7 and traveller g for spinning the yarn in winding it on the bobbin 7. h is the guiding member, being a short rod of porce lain. So much is old and well known, as already indicated.

On any fixed part of the machine, as the bracket d, I mount the support shown in detail in Figs. 3 to 5. It is shown as a block of metal whose basal portion 2' is a blade that is transversely triangular from end to end and in plan and also in side elevation tapers from one end to the other and has upstanding from its end portions two upright portions j j forming between them a yarn-crotch, one of said portions having I the uprights j and these receive the guiding member h, which may be kept in place by a screw m screwed into one of the holes, the otherbeing closed at one end. At its sides the blade 2' affords ridges i i which in the present case are angular, forming edges. The under side of the blade is preferably concave, being cylindrical around an axis extending lengthwise of the blade and having a radius approximating that of the roller 0.

The positions of the support and guiding member when assembled and in place on the machine are shown by Fig. 1. The under cylindrical surface of the blade i is then substantially parallel with the periphery of the roller 0. The yarn-disrupting ridges then. he near to both the roller and the guiding member, though of course considerably nearer to the former than the latter.

In use, the yarn is made to embrace both the roller and the guiding member, being received in the crotch formed by the uprights of the described support, as shown in Figs. 1 and 2. If, per-chance, a turn of the yarn should come to embrace only the guiding member and support one or both of the ridges z" 2' will act to disrupt it. If, on the other hand, a ringer should form on the roller, before it can proceed to'build up or accumu late so far as to impose undue pressure on the support the ridge 2' ot the latter will disrupt it, this ridge being presented con trary to the direction of rotation as shown by the arrow in Fig. 2. When the disrupting takes place it will at any rate afiect the last turn deposited 011 the roller, so that the yarn is parted between the roller and the bobbins a, which will release the stopping means for the winding unit shown and cause stopping of the rotation of the receiving bobbin the stopping means is not herein fully shown, as any known type will serve, but the usual taller device of said means is shown at n.

Sometimes, when a turn occurs around the guiding member and ridge the ridge may not disrupt the yarni. e., it will simply impose so much tension on the yarn that the unit becomes practically inoperative, the excessive tension actually causing the traveller g to move so sluggishly (it at all) around the ring 9 that the attendant notices it and stops the unit to correct the trouble.

The taper of the blade as viewed laterally and in plan is designed to bring the edge 2" 2' of the support uniformly close to the roller from end to end of said edges, notwithstanding the pitch of its upper portion.

By stating that the ridge is near both the guiding member and roller I mean to convey that if it has this location it will necessarily be out of the way of the yarn if the latter is extending properly but in position to receive any turn of yarn inadvertently made to encompass the guide member and not the roller; in the best form the ridge or ridges are placed within what I term the shed l3 formed by the arching of the yarn turns over guide member h.

It will be obvious that the number of turns of yarn which are maintained around the guiding member and roller is not mate rial, nor it material what is the length of the ridge or ridges.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is l. In a twisting machine, yarn feeding and guiding means including a rotated feed ing roller and a fixed structure located radially outward of the roller and around which and the roller the yarn extends and including a guiding member for the yarn, said structure including a fixed yarn-disrupting ridge extending generally lengthwise of the axis of the roller.

2. In a twisting machine, yarn feeding and guiding means including a rotated feeding roller and a yarn-guiding member located radially outward of the roller and around which and the roller the yarn extends, said means including a fixed yarn-disrupting ridge extending generally, lengthwise of the axis of the roller and within the shed of yarn maintained by said member and the roller.

3. In a twisting machine, yarn feeding and guiding means including a rotated feeding roller and a yarn-guiding member located radially outward of the roller and around which and the roller the yarn extends, said means including a fixed yarn-disrupting ridge extending generally lengthwise of the axis of the roller and close to the periphery of the latter.

4:. In a twisting machine, yarn feeding and guiding means including a rotated feeding roller and a yarn-guiding member located radially outward of the roller and around which and the roller the yarn extends, said means including oppositely facing yarn disrupting ridges extending generally lengthwise of the axis of the roller and within the shed of yarn maintained by said member and the roller.

5. In a twisting machine, the combination of a rotated yarn-feeding roller, a yarnguiding member located radially outward of the roller and around which and the roller the yarn extends, and a fixed support for said member having a yarn-disrupting ridge extending generally lengthwise of the axis of the roller and around which the yarn also extends.

6. In a twisting machine, yarn feeding and guiding means including a rotated feeding roller anda fixed structure located radially outward oi the roller and around which and the roller the yarn extends and including a guiding member for the yarn, said structure including a fixed yarn-contact ridge extending generally lengthwise of the axis of the roller.

a. In a twisting machine, yarn feeding and guiding means including a rotated feeding roller and a yarn-guiding member located radially outward of the roller and around which and the roller the yarn extends, said means including a fixed yarncontact ridge extending generally length- Wise of the axis of the roller and Within the shed of yarn maintained by said memher and the roller.

In testimony whereof I afiix my signature.

HENRY DOHERTY, JR. 

